lxc init ubuntu:18.04 ubuntu

returns:

Generating a client certificate. This may take a minute...
Do you want to configure a new storage pool (yes/no) [default=yes]? yes
Name of the storage backend to use (dir or zfs) [default=dir]:\ 
Would you like LXD to be available over the network (yes/no) [default=no]? yes
Address to bind LXD to (not including port) [default=all]: Port to bind LXD to [default=8443]: 
Trust password for new clients:
Again: 
Do you want to configure the LXD bridge (yes/no) [default=yes]? 
# A network configuration screen will appear at this point. 
Warning: Stopping lxd.service, but it can still be activated by:  lxd.socket
LXD has been successfully configured.